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PODCAST

ASTRONOMY 209 PODCAST

This page contains live, video podcasts of Astronomy 209 (Introduction to Astronomy II - The Cosmos) lectures taught at the University of Calgary. AST209 is a comprehensive, descriptive overview of various aspects of the universe outside the solar system covering topics such as: the history of astronomy, interstellar space, stars, galaxies, black holes, supernovae, and the origins of life and the universe. Course details can be found at the AST209 Course website.

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All Episodes

01:02:26

ASTR209 - Final Review

ASTRONOMY 209 PODCAST ·

2018/04/13

In this, the final lecture of the semester, I attempt to review the main, salient points of the course. Whew! Quite a whirlwind!

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00:55:03

ASTR209 - Lecture 23

ASTRONOMY 209 PODCAST ·

2018/04/10

In this, the LAST lecture of the semester, we discuss General Relativity and Black Holes.

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00:59:48

ASTR209 - Lecture 22

ASTRONOMY 209 PODCAST ·

2018/04/05

In this lecture we discuss the final stages of the evolution of low and high mass stars. We also learn about Nova and Supernovae. Finally we talk about Neutron stars and begin a discussion on Black Holes

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01:06:57

ASTR209 - Lecture 21

ASTRONOMY 209 PODCAST ·

2018/04/03

In this lecture we discuss how a low mass star evolves off the main sequence when it runs out of hydrogen to fuse in its core. We follow its evolution from the Main Sequence to a Red Giant to a Supergiant to a Planetary Nebula to a White Dwarf.

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00:53:25

ASTR209 - Lecture 20

ASTRONOMY 209 PODCAST ·

2018/03/29

In this lecture we discuss the formation of planets and the discoveries of exoplanets around other stars.

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01:06:50

ASTR209 - Lecture 19

ASTRONOMY 209 PODCAST ·

2018/03/27

In this lecture we continue to discuss the process of star formation from the fragmentation of a giant molecular cloud, to the collapse of the fragment and the formation of the protostar and disk. We also show where the protostar appears on the HR diagram, and how it evolves onto the main sequence.

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01:13:27

ASTR209 - Lecture 18

ASTRONOMY 209 PODCAST ·

2018/03/20

In this lecture we discuss the hydrogen spin flip transition that produces radiation at 21cm. We also describe the rich and complex molecular chemistry that exists in "molecular clouds", and how these clouds are intimately related to the formation of stars.

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01:06:08

ASTR209 - Lecture 17

ASTRONOMY 209 PODCAST ·

2018/03/15

In this class we discuss binary stars and how they are used to determine stellar mass. We then begin to discuss the Interstellar Medium.

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ASTR209 - Lecture 16

ASTRONOMY 209 PODCAST ·

2018/03/13

No podcast today. Camera kept cutting out again.....

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01:12:55

ASTR209 - Lecture 15

ASTRONOMY 209 PODCAST ·

2018/03/08

In this lecture we discuss the basic properties of stars and the stellar Classification system (OBAFGKM) as well as luminosity classes (I through V). We also investigate the the HR diagram and what it infers about stellar properties.

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00:41:15

ASTR209 - Lecture 14

ASTRONOMY 209 PODCAST ·

2018/03/06

The camera cut out again but we got 40 minutes of discussion on the properties of the Sun and the process of nuclear fusion.

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00:46:41

ASTR209 - Lecture 12

ASTRONOMY 209 PODCAST ·

2018/02/27

In this lecture (back from illness, reading week, and the midterm exam!) we talk about "seeing", different telescopes, why we go to high altitudes to build them, and why we build telescopes to operate at different wavelengths (i.e. what different physical phenomena in the Universe emit at different wavelengths). We also begin to talk about radio telescopes.

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00:00:00

ASTR209 - Lectures 10 & 11

ASTRONOMY 209 PODCAST ·

2018/02/14

No podcasts of these lectures due to illness

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01:13:50

ASTR209 - Lecture 9

ASTRONOMY 209 PODCAST ·

2018/02/06

In this lectrure we discuss the varous "type" of light across the Electromagnetic spectrum (radio, IR, visible, etc.) and then also how solid objects produce light i.e. Black Body radiation. We investigate how the color and intensity of light changes with temperature, and then how to actually calculate the temperature of a Black Body precisely (Wien's Law) and the total amount of energy produced (Stefan's Law).

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01:11:14

ASTR209 - Lecture 8

ASTRONOMY 209 PODCAST ·

2018/02/01

In this lecture we explore the many uses of Newton's version of Kepler's law as a tool to determine the masses of objects in the Universe. We then move on to Part 2 of the class notes (the Electromagnetic spectrum) and talk about the particle and wave natures of light including concepts of diffraction, interference, wavelength, frequency and energy.

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01:01:54

ASTR209 - Lecture 7

ASTRONOMY 209 PODCAST ·

2018/01/30

In this lecture we explore Newton's laws of motion and gravity and show how how he unifies terrestrial and celestial motion. We provide and use the equations for gravitational force, gravitational acceleration, and orbital velocity. We also discuss the difference between mass and weight.

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01:14:25

ASTR209 - Lecture 6

ASTRONOMY 209 PODCAST ·

2018/01/25

In this lecture we finish our discussion of Galileo's contribution to the Heliocentric model and begin to discuss motion in the Universe via a focus on Newton's three laws.

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01:11:21

ASTR209 - Lecture 5

ASTRONOMY 209 PODCAST ·

2018/01/23

In this lecture we begin to discuss the rise of the heliocentric model of the Universe/Solar System in the rennaissance. We describe the Copernican model, Tycho Brahe's observations, and Kepler's use of Brahe's data to create his 3 laws of Planetary motion. We also begin to describe Galileo's contribution to the heliocentric model and the death of geocentrism.

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01:09:11

ASTR209 - Lecture 4

ASTRONOMY 209 PODCAST ·

2018/01/18

In this lecture we discuss the geocentric model of Ptolemy, the heliocentric model of Aristarchus and how Hipparchus tested it using the concept of parallax. We also saw how to use observations of parallax to measure the distance to celestial objects.

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00:50:12

ASTR209 - Lecture 3b

ASTRONOMY 209 PODCAST ·

2018/01/16

In this lecture we continue to examine some ancient (and still true) observations about the Universe such as dailly, direct, and retrograde motions of the stars and planets, circumpolar stars, etc.This is part 2 of 2 separate recordings of this lecture since the video stopped recording again..... :-(

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23 results

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